AP-GfK poll: Obama 47, Romney 46

8/22/12 6:59 AM EDT

Another day, another national poll showing the 2012 race within the margin of error, with perhaps the most precarious of advantages for Obama-Biden — here's the AP write-up:

Overall, 47 percent of registered voters said they planned to back Obama and Vice President Joe Biden in November, while 46 percent favored Romney and Ryan. That's not much changed from a June AP-GfK survey, when the split was 47 percent for the president to 44 percent for Romney.

At the same time, there's a far wider gap when people were asked who they thought would win. Some 58 percent of adults said they expected Obama to be re-elected, while just 32 percent said they thought he'd be voted out of office.

After just over a week on the campaign trail, Ryan has a 38 percent favorable rating among adults, while 34 percent see him unfavorably. Among registered voters, his numbers are slightly better — 40 percent favorable to 34 percent unfavorable. Ryan remains unknown to about a quarter of voters.